Isocyanato terminated precursor and method of making the same
AssigneeLear Corporation
InventorsThomas N. Jones, Edmund J. Madaj
Life of this patent
Estimating the term…
Abstract
A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.
Claims18
A method of making an isocyanato terminated precursor for polyurethane, the method comprising:
- heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere;
- and
- mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor, wherein the modified vegetable oil comprises a polymerized, oxidized vegetable oil.
A method of making an isocyanate precursor for polyurethane, the method comprising:
- heating an isocyanate containing about two or more isocyanato groups per molecule to a temperature of between about 40 and 70 degrees Celsius at a pressure of about 1 atmosphere;
- and
- adding a modified vegetable oil comprising about two or more hydroxyl groups per molecule and a hydroxyl number of about 52 to the isocyanate at a molar equivalent ratio of at least 2:1 of isocyanate to vegetable oil, the modified vegetable oil having a temperature of between about 25 and 70 degrees Celsius;
- mixing the modified vegetable oil with the isocyanate for a predetermined time period to react the modified vegetable oil with the isocyanate to form the isocyanato terminated precursor;
- and
- cooling the isocyanato terminated precursor to room temperature.
A method of making an isocyanato terminated precursor for polyurethane, the method comprising:
- heating a first amount of isocyanate containing about two or more isocyanato groups per molecule;
- mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate wherein the modified vegetable oil comprises a polymerized, oxidized vegetable oil;
- reacting the modified vegetable oil with the first amount of isocyanate to form an isocyanato terminated precursor;
- and
- mixing a second amount of isocyanate with the isocyanate terminated precursor.
Dependencies are inferred from the claim text.